/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/pnr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:27:11,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:27:11,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:27:12,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:27:12,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:27:12,063 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:27:12,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:27:12,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:27:12,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:27:12,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:27:12,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:27:12,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:27:12,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:27:12,066 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:27:12,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:27:12,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:27:12,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:27:12,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:27:12,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:27:12,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:27:12,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:27:12,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:27:12,068 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:27:12,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:27:12,068 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:27:12,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:27:12,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:27:12,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:27:12,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:27:12,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:27:12,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:27:12,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:27:12,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:27:12,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:27:12,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:27:12,069 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:27:12,069 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:27:12,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:27:12,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:27:12,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:27:12,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:27:12,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:27:12,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:27:12,325 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:27:12,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr4.c [2022-01-30 22:27:12,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607940d92/a27691b6966f4bb5b56e300d106745e9/FLAG35106f94b [2022-01-30 22:27:12,814 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:27:12,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr4.c [2022-01-30 22:27:12,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607940d92/a27691b6966f4bb5b56e300d106745e9/FLAG35106f94b [2022-01-30 22:27:12,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607940d92/a27691b6966f4bb5b56e300d106745e9 [2022-01-30 22:27:12,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:27:12,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:27:12,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:27:12,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:27:12,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:27:12,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:27:12" (1/1) ... [2022-01-30 22:27:12,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4d042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:12, skipping insertion in model container [2022-01-30 22:27:12,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:27:12" (1/1) ... [2022-01-30 22:27:12,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:27:12,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:27:13,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr4.c[395,408] [2022-01-30 22:27:13,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:27:13,051 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:27:13,070 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr4.c[395,408] [2022-01-30 22:27:13,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:27:13,102 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:27:13,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13 WrapperNode [2022-01-30 22:27:13,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:27:13,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:27:13,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:27:13,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:27:13,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:27:13,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:27:13,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:27:13,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:27:13,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (1/1) ... [2022-01-30 22:27:13,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:27:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:13,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 22:27:13,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 22:27:13,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:27:13,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:27:13,243 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:27:13,243 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:27:13,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:27:13,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-01-30 22:27:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-30 22:27:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-01-30 22:27:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:27:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-30 22:27:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:27:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:27:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:27:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:27:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:27:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:27:13,329 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:27:13,330 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:27:13,520 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:27:13,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:27:13,526 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 22:27:13,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:27:13 BoogieIcfgContainer [2022-01-30 22:27:13,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:27:13,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:27:13,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:27:13,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:27:13,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:27:12" (1/3) ... [2022-01-30 22:27:13,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611305ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:27:13, skipping insertion in model container [2022-01-30 22:27:13,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:27:13" (2/3) ... [2022-01-30 22:27:13,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611305ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:27:13, skipping insertion in model container [2022-01-30 22:27:13,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:27:13" (3/3) ... [2022-01-30 22:27:13,535 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr4.c [2022-01-30 22:27:13,540 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:27:13,541 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:27:13,584 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:27:13,593 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:27:13,593 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:27:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 33 states have internal predecessors, (45), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-30 22:27:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 22:27:13,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:13,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:13,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1861515766, now seen corresponding path program 1 times [2022-01-30 22:27:13,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912785059] [2022-01-30 22:27:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:13,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:27:13,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:13,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912785059] [2022-01-30 22:27:13,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912785059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:27:13,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:27:13,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:27:13,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908391650] [2022-01-30 22:27:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:27:13,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:27:13,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:27:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:27:13,872 INFO L87 Difference]: Start difference. First operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 33 states have internal predecessors, (45), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:27:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:14,007 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-01-30 22:27:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:27:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-01-30 22:27:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:14,020 INFO L225 Difference]: With dead ends: 83 [2022-01-30 22:27:14,020 INFO L226 Difference]: Without dead ends: 42 [2022-01-30 22:27:14,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:27:14,027 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:14,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 61 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:27:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-30 22:27:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-30 22:27:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 22:27:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-01-30 22:27:14,067 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 21 [2022-01-30 22:27:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:14,068 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-01-30 22:27:14,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:27:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-01-30 22:27:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-30 22:27:14,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:14,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:14,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 22:27:14,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1160451188, now seen corresponding path program 1 times [2022-01-30 22:27:14,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:14,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182487257] [2022-01-30 22:27:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:14,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:27:14,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:14,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182487257] [2022-01-30 22:27:14,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182487257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:27:14,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:27:14,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-30 22:27:14,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876371025] [2022-01-30 22:27:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:27:14,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 22:27:14,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 22:27:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:27:14,279 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:27:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:14,470 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-01-30 22:27:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:27:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-30 22:27:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:14,472 INFO L225 Difference]: With dead ends: 67 [2022-01-30 22:27:14,472 INFO L226 Difference]: Without dead ends: 56 [2022-01-30 22:27:14,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-30 22:27:14,482 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:14,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 46 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:27:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-30 22:27:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2022-01-30 22:27:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 22:27:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-01-30 22:27:14,505 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 21 [2022-01-30 22:27:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:14,505 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-01-30 22:27:14,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:27:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-01-30 22:27:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-30 22:27:14,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:14,507 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:14,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 22:27:14,510 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1978408055, now seen corresponding path program 1 times [2022-01-30 22:27:14,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211569298] [2022-01-30 22:27:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:14,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:14,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:14,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211569298] [2022-01-30 22:27:14,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211569298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:14,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312591517] [2022-01-30 22:27:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:14,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:14,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:14,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:14,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:27:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-30 22:27:14,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:15,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:15,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:15,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:27:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:15,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:27:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:15,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-01-30 22:27:15,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:27:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:15,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:15,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-01-30 22:27:15,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-30 22:27:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:15,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312591517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:15,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:15,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2022-01-30 22:27:15,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98555005] [2022-01-30 22:27:15,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:15,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:27:15,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:27:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:27:15,651 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-30 22:27:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:16,271 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2022-01-30 22:27:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 22:27:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 47 [2022-01-30 22:27:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:16,273 INFO L225 Difference]: With dead ends: 113 [2022-01-30 22:27:16,273 INFO L226 Difference]: Without dead ends: 111 [2022-01-30 22:27:16,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-30 22:27:16,275 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 80 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:16,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 336 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 22:27:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-30 22:27:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2022-01-30 22:27:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-30 22:27:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-01-30 22:27:16,295 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 47 [2022-01-30 22:27:16,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:16,296 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-01-30 22:27:16,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-30 22:27:16,296 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-01-30 22:27:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-30 22:27:16,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:16,298 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:16,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:16,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:16,519 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:16,520 INFO L85 PathProgramCache]: Analyzing trace with hash -393331207, now seen corresponding path program 1 times [2022-01-30 22:27:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:16,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014215110] [2022-01-30 22:27:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:16,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:16,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014215110] [2022-01-30 22:27:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014215110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055917194] [2022-01-30 22:27:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:16,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:16,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:16,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:27:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:16,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-30 22:27:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:17,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:17,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:17,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:17,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:17,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-30 22:27:17,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:27:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:27:17,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:18,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-30 22:27:18,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-30 22:27:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:18,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055917194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:18,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:18,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2022-01-30 22:27:18,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116165697] [2022-01-30 22:27:18,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:18,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:27:18,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:27:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:27:18,741 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-30 22:27:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:19,852 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2022-01-30 22:27:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:27:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) Word has length 47 [2022-01-30 22:27:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:19,855 INFO L225 Difference]: With dead ends: 167 [2022-01-30 22:27:19,855 INFO L226 Difference]: Without dead ends: 165 [2022-01-30 22:27:19,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2022-01-30 22:27:19,857 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 136 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:19,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 392 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 833 Invalid, 0 Unknown, 111 Unchecked, 0.8s Time] [2022-01-30 22:27:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-30 22:27:19,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 91. [2022-01-30 22:27:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 65 states have internal predecessors, (82), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-30 22:27:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2022-01-30 22:27:19,901 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 47 [2022-01-30 22:27:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:19,902 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2022-01-30 22:27:19,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 12 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-30 22:27:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2022-01-30 22:27:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-30 22:27:19,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:19,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:19,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:20,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-30 22:27:20,121 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash -279715624, now seen corresponding path program 1 times [2022-01-30 22:27:20,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:20,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702874795] [2022-01-30 22:27:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:20,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-30 22:27:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:20,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:20,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702874795] [2022-01-30 22:27:20,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702874795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:20,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730744939] [2022-01-30 22:27:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:20,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:20,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:20,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:20,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:27:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-30 22:27:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:20,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:20,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:27:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:20,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-01-30 22:27:20,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:27:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:20,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:21,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:27:21,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:27:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:21,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730744939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:21,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:21,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 17 [2022-01-30 22:27:21,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235958644] [2022-01-30 22:27:21,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:21,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-30 22:27:21,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:21,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-30 22:27:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-30 22:27:21,195 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-01-30 22:27:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:21,907 INFO L93 Difference]: Finished difference Result 276 states and 409 transitions. [2022-01-30 22:27:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 22:27:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 55 [2022-01-30 22:27:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:21,910 INFO L225 Difference]: With dead ends: 276 [2022-01-30 22:27:21,910 INFO L226 Difference]: Without dead ends: 274 [2022-01-30 22:27:21,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:27:21,914 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 88 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:21,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 393 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-30 22:27:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-30 22:27:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 151. [2022-01-30 22:27:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 110 states have internal predecessors, (140), 38 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 32 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-30 22:27:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 215 transitions. [2022-01-30 22:27:21,985 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 215 transitions. Word has length 55 [2022-01-30 22:27:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:21,986 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 215 transitions. [2022-01-30 22:27:21,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-01-30 22:27:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 215 transitions. [2022-01-30 22:27:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-30 22:27:21,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:21,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:22,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:22,212 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1106487770, now seen corresponding path program 1 times [2022-01-30 22:27:22,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:22,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801435235] [2022-01-30 22:27:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:22,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-30 22:27:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:22,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801435235] [2022-01-30 22:27:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801435235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690789982] [2022-01-30 22:27:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:22,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:22,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:27:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:22,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-30 22:27:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:22,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:22,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:22,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:27:23,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:27:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 22:27:23,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:23,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:27:23,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:27:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-30 22:27:23,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690789982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:23,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:23,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-01-30 22:27:23,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636605845] [2022-01-30 22:27:23,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:23,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:27:23,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:27:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:27:23,857 INFO L87 Difference]: Start difference. First operand 151 states and 215 transitions. Second operand has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 15 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-01-30 22:27:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:24,956 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2022-01-30 22:27:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:27:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 15 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) Word has length 55 [2022-01-30 22:27:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:24,963 INFO L225 Difference]: With dead ends: 383 [2022-01-30 22:27:24,963 INFO L226 Difference]: Without dead ends: 381 [2022-01-30 22:27:24,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:27:24,967 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 181 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:24,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 567 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1233 Invalid, 0 Unknown, 201 Unchecked, 0.7s Time] [2022-01-30 22:27:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-30 22:27:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 221. [2022-01-30 22:27:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 156 states have (on average 1.358974358974359) internal successors, (212), 161 states have internal predecessors, (212), 54 states have call successors, (54), 11 states have call predecessors, (54), 10 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-30 22:27:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 319 transitions. [2022-01-30 22:27:25,018 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 319 transitions. Word has length 55 [2022-01-30 22:27:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:25,018 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 319 transitions. [2022-01-30 22:27:25,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 15 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-01-30 22:27:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 319 transitions. [2022-01-30 22:27:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-30 22:27:25,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:25,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:25,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:25,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1532644295, now seen corresponding path program 2 times [2022-01-30 22:27:25,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:25,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89352804] [2022-01-30 22:27:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:25,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-30 22:27:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-30 22:27:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 22:27:25,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89352804] [2022-01-30 22:27:25,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89352804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:25,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271060008] [2022-01-30 22:27:25,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:25,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:25,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:25,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:25,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:27:25,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:25,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:25,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-30 22:27:25,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:25,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:25,546 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:27:25,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:27:25,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-01-30 22:27:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 22:27:25,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:25,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:27:25,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:27:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 22:27:25,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271060008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:25,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:25,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 16 [2022-01-30 22:27:25,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292496832] [2022-01-30 22:27:25,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:25,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 22:27:25,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:25,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 22:27:25,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:27:25,804 INFO L87 Difference]: Start difference. First operand 221 states and 319 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 8 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-30 22:27:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:26,850 INFO L93 Difference]: Finished difference Result 1262 states and 1980 transitions. [2022-01-30 22:27:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 22:27:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 8 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 63 [2022-01-30 22:27:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:26,858 INFO L225 Difference]: With dead ends: 1262 [2022-01-30 22:27:26,858 INFO L226 Difference]: Without dead ends: 1260 [2022-01-30 22:27:26,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-01-30 22:27:26,860 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 87 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:26,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 500 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-30 22:27:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-30 22:27:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 458. [2022-01-30 22:27:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 324 states have (on average 1.3981481481481481) internal successors, (453), 334 states have internal predecessors, (453), 122 states have call successors, (122), 12 states have call predecessors, (122), 11 states have return successors, (121), 111 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-30 22:27:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 696 transitions. [2022-01-30 22:27:26,940 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 696 transitions. Word has length 63 [2022-01-30 22:27:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:26,940 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 696 transitions. [2022-01-30 22:27:26,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 8 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-30 22:27:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 696 transitions. [2022-01-30 22:27:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-30 22:27:26,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:26,943 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:26,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:27,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:27,159 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:27,159 INFO L85 PathProgramCache]: Analyzing trace with hash -831044421, now seen corresponding path program 1 times [2022-01-30 22:27:27,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:27,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859473029] [2022-01-30 22:27:27,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:27,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-30 22:27:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-30 22:27:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 22:27:27,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:27,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859473029] [2022-01-30 22:27:27,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859473029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:27,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588615355] [2022-01-30 22:27:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:27,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:27,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:27,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:27,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:27:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-30 22:27:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:27,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:27,602 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:27:27,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:27:27,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:27:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 22:27:27,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:30,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:27:30,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:27:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-30 22:27:30,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588615355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:30,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:30,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 29 [2022-01-30 22:27:30,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423703815] [2022-01-30 22:27:30,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:30,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-30 22:27:30,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-30 22:27:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=713, Unknown=1, NotChecked=0, Total=812 [2022-01-30 22:27:30,176 INFO L87 Difference]: Start difference. First operand 458 states and 696 transitions. Second operand has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 17 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-01-30 22:27:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:31,988 INFO L93 Difference]: Finished difference Result 1378 states and 2121 transitions. [2022-01-30 22:27:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-30 22:27:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 17 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) Word has length 63 [2022-01-30 22:27:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:31,996 INFO L225 Difference]: With dead ends: 1378 [2022-01-30 22:27:31,996 INFO L226 Difference]: Without dead ends: 1376 [2022-01-30 22:27:31,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 120 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=411, Invalid=2450, Unknown=1, NotChecked=0, Total=2862 [2022-01-30 22:27:31,998 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 205 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:31,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 863 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 2329 Invalid, 0 Unknown, 238 Unchecked, 1.2s Time] [2022-01-30 22:27:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-01-30 22:27:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 551. [2022-01-30 22:27:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 393 states have (on average 1.3944020356234097) internal successors, (548), 403 states have internal predecessors, (548), 140 states have call successors, (140), 18 states have call predecessors, (140), 17 states have return successors, (139), 129 states have call predecessors, (139), 139 states have call successors, (139) [2022-01-30 22:27:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 827 transitions. [2022-01-30 22:27:32,081 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 827 transitions. Word has length 63 [2022-01-30 22:27:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:32,082 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 827 transitions. [2022-01-30 22:27:32,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 17 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2022-01-30 22:27:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 827 transitions. [2022-01-30 22:27:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-30 22:27:32,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:32,086 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:32,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-30 22:27:32,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:32,311 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash 241342106, now seen corresponding path program 3 times [2022-01-30 22:27:32,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:32,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957980527] [2022-01-30 22:27:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:32,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-30 22:27:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-30 22:27:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:27:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:27:32,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:32,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957980527] [2022-01-30 22:27:32,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957980527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:32,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484457767] [2022-01-30 22:27:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:27:32,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:32,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:32,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:27:32,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-30 22:27:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-30 22:27:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:32,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:27:32,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-01-30 22:27:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:27:32,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:33,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:27:33,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:27:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:27:33,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484457767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:33,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:33,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-01-30 22:27:33,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907579820] [2022-01-30 22:27:33,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:33,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:27:33,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:27:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:27:33,123 INFO L87 Difference]: Start difference. First operand 551 states and 827 transitions. Second operand has 25 states, 24 states have (on average 3.25) internal successors, (78), 22 states have internal predecessors, (78), 14 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-01-30 22:27:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:35,310 INFO L93 Difference]: Finished difference Result 3829 states and 6066 transitions. [2022-01-30 22:27:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-30 22:27:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.25) internal successors, (78), 22 states have internal predecessors, (78), 14 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) Word has length 71 [2022-01-30 22:27:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:35,331 INFO L225 Difference]: With dead ends: 3829 [2022-01-30 22:27:35,332 INFO L226 Difference]: Without dead ends: 3827 [2022-01-30 22:27:35,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=2341, Unknown=0, NotChecked=0, Total=2756 [2022-01-30 22:27:35,337 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 211 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 2982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:35,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 857 Invalid, 2982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-30 22:27:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2022-01-30 22:27:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 1604. [2022-01-30 22:27:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1141 states have (on average 1.4382120946538124) internal successors, (1641), 1161 states have internal predecessors, (1641), 443 states have call successors, (443), 20 states have call predecessors, (443), 19 states have return successors, (442), 422 states have call predecessors, (442), 442 states have call successors, (442) [2022-01-30 22:27:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2526 transitions. [2022-01-30 22:27:35,586 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2526 transitions. Word has length 71 [2022-01-30 22:27:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:35,586 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2526 transitions. [2022-01-30 22:27:35,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.25) internal successors, (78), 22 states have internal predecessors, (78), 14 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-01-30 22:27:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2526 transitions. [2022-01-30 22:27:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-30 22:27:35,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:35,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:35,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:35,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:35,807 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash 168955548, now seen corresponding path program 1 times [2022-01-30 22:27:35,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:35,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798742451] [2022-01-30 22:27:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:35,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:35,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-30 22:27:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-30 22:27:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:27:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:27:36,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798742451] [2022-01-30 22:27:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798742451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797061676] [2022-01-30 22:27:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:36,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:36,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:36,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:27:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-30 22:27:36,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:36,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:27:36,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:27:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:27:36,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:36,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:27:36,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:27:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 22:27:36,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797061676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:36,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:36,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 31 [2022-01-30 22:27:36,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583437754] [2022-01-30 22:27:36,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:36,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-30 22:27:36,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-30 22:27:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-01-30 22:27:36,933 INFO L87 Difference]: Start difference. First operand 1604 states and 2526 transitions. Second operand has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 18 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2022-01-30 22:27:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:44,332 INFO L93 Difference]: Finished difference Result 5632 states and 8938 transitions. [2022-01-30 22:27:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-30 22:27:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 18 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) Word has length 71 [2022-01-30 22:27:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:44,356 INFO L225 Difference]: With dead ends: 5632 [2022-01-30 22:27:44,356 INFO L226 Difference]: Without dead ends: 5630 [2022-01-30 22:27:44,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 159 SyntacticMatches, 15 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3356 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1160, Invalid=8541, Unknown=1, NotChecked=0, Total=9702 [2022-01-30 22:27:44,363 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 643 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 4819 mSolverCounterSat, 1599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 6878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1599 IncrementalHoareTripleChecker+Valid, 4819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:44,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 1649 Invalid, 6878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1599 Valid, 4819 Invalid, 0 Unknown, 460 Unchecked, 2.8s Time] [2022-01-30 22:27:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2022-01-30 22:27:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 1604. [2022-01-30 22:27:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1141 states have (on average 1.4390885188431202) internal successors, (1642), 1160 states have internal predecessors, (1642), 440 states have call successors, (440), 23 states have call predecessors, (440), 22 states have return successors, (439), 420 states have call predecessors, (439), 439 states have call successors, (439) [2022-01-30 22:27:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2521 transitions. [2022-01-30 22:27:44,726 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2521 transitions. Word has length 71 [2022-01-30 22:27:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:44,726 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2521 transitions. [2022-01-30 22:27:44,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 18 states have call successors, (30), 5 states have call predecessors, (30), 2 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2022-01-30 22:27:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2521 transitions. [2022-01-30 22:27:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-30 22:27:44,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:44,730 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:44,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:44,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 22:27:44,949 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1340682790, now seen corresponding path program 2 times [2022-01-30 22:27:44,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:44,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176667046] [2022-01-30 22:27:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:44,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:27:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:27:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-30 22:27:45,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176667046] [2022-01-30 22:27:45,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176667046] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133608881] [2022-01-30 22:27:45,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:45,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:45,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:45,231 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:45,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:27:45,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 22:27:45,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:45,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:45,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:45,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:45,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:45,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:45,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:45,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:45,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:27:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:45,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:27:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:45,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:27:45,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:45,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:27:46,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:27:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-01-30 22:27:46,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:47,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133608881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:47,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:27:47,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-30 22:27:47,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031532546] [2022-01-30 22:27:47,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:47,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-30 22:27:47,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-30 22:27:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=524, Unknown=1, NotChecked=0, Total=600 [2022-01-30 22:27:47,586 INFO L87 Difference]: Start difference. First operand 1604 states and 2521 transitions. Second operand has 22 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 12 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-30 22:27:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:48,825 INFO L93 Difference]: Finished difference Result 2577 states and 3976 transitions. [2022-01-30 22:27:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-30 22:27:48,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 12 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) Word has length 73 [2022-01-30 22:27:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:48,835 INFO L225 Difference]: With dead ends: 2577 [2022-01-30 22:27:48,835 INFO L226 Difference]: Without dead ends: 2575 [2022-01-30 22:27:48,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=235, Invalid=1570, Unknown=1, NotChecked=0, Total=1806 [2022-01-30 22:27:48,837 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 188 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:48,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 579 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1270 Invalid, 0 Unknown, 155 Unchecked, 0.6s Time] [2022-01-30 22:27:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2022-01-30 22:27:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 1558. [2022-01-30 22:27:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1099 states have (on average 1.4358507734303914) internal successors, (1578), 1127 states have internal predecessors, (1578), 435 states have call successors, (435), 24 states have call predecessors, (435), 23 states have return successors, (434), 406 states have call predecessors, (434), 434 states have call successors, (434) [2022-01-30 22:27:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 2447 transitions. [2022-01-30 22:27:49,112 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 2447 transitions. Word has length 73 [2022-01-30 22:27:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:49,112 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 2447 transitions. [2022-01-30 22:27:49,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 12 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-30 22:27:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 2447 transitions. [2022-01-30 22:27:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-30 22:27:49,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:49,116 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:49,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:49,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:49,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:49,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1811183621, now seen corresponding path program 4 times [2022-01-30 22:27:49,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:49,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913713708] [2022-01-30 22:27:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:49,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-30 22:27:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-30 22:27:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:27:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:27:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-30 22:27:49,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913713708] [2022-01-30 22:27:49,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913713708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:49,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134409522] [2022-01-30 22:27:49,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:27:49,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:49,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:49,692 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:49,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:27:49,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:27:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-30 22:27:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-30 22:27:50,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-30 22:27:50,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134409522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:27:50,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:27:50,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-01-30 22:27:50,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595364346] [2022-01-30 22:27:50,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:50,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-30 22:27:50,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-30 22:27:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2022-01-30 22:27:50,737 INFO L87 Difference]: Start difference. First operand 1558 states and 2447 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 20 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) [2022-01-30 22:27:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:51,468 INFO L93 Difference]: Finished difference Result 1724 states and 2669 transitions. [2022-01-30 22:27:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-30 22:27:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 20 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) Word has length 79 [2022-01-30 22:27:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:51,474 INFO L225 Difference]: With dead ends: 1724 [2022-01-30 22:27:51,474 INFO L226 Difference]: Without dead ends: 1636 [2022-01-30 22:27:51,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:27:51,476 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 206 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:51,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 120 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 22:27:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-01-30 22:27:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1531. [2022-01-30 22:27:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1080 states have (on average 1.4296296296296296) internal successors, (1544), 1105 states have internal predecessors, (1544), 431 states have call successors, (431), 20 states have call predecessors, (431), 19 states have return successors, (430), 405 states have call predecessors, (430), 430 states have call successors, (430) [2022-01-30 22:27:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2405 transitions. [2022-01-30 22:27:51,823 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2405 transitions. Word has length 79 [2022-01-30 22:27:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:51,823 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 2405 transitions. [2022-01-30 22:27:51,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 20 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) [2022-01-30 22:27:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2405 transitions. [2022-01-30 22:27:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-30 22:27:51,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:51,827 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:51,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:52,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 22:27:52,047 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -689993081, now seen corresponding path program 2 times [2022-01-30 22:27:52,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:52,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304900749] [2022-01-30 22:27:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:52,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:27:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:27:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:27:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-30 22:27:52,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304900749] [2022-01-30 22:27:52,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304900749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491231620] [2022-01-30 22:27:52,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:52,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:52,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:52,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:52,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:27:52,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:52,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:52,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 22:27:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:52,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:52,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:52,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:52,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:52,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:52,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:52,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:27:52,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:53,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:27:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-30 22:27:53,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:54,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491231620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:54,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:27:54,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-01-30 22:27:54,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897225275] [2022-01-30 22:27:54,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:54,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-30 22:27:54,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-30 22:27:54,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=619, Unknown=1, NotChecked=0, Total=702 [2022-01-30 22:27:54,190 INFO L87 Difference]: Start difference. First operand 1531 states and 2405 transitions. Second operand has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 14 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-30 22:27:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:27:55,179 INFO L93 Difference]: Finished difference Result 1680 states and 2598 transitions. [2022-01-30 22:27:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-30 22:27:55,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 14 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) Word has length 81 [2022-01-30 22:27:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:27:55,186 INFO L225 Difference]: With dead ends: 1680 [2022-01-30 22:27:55,186 INFO L226 Difference]: Without dead ends: 1678 [2022-01-30 22:27:55,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 17 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=214, Invalid=1507, Unknown=1, NotChecked=0, Total=1722 [2022-01-30 22:27:55,188 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 157 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:27:55,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 511 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 968 Invalid, 0 Unknown, 152 Unchecked, 0.5s Time] [2022-01-30 22:27:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-01-30 22:27:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1115. [2022-01-30 22:27:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 788 states have (on average 1.4124365482233503) internal successors, (1113), 806 states have internal predecessors, (1113), 303 states have call successors, (303), 24 states have call predecessors, (303), 23 states have return successors, (302), 284 states have call predecessors, (302), 302 states have call successors, (302) [2022-01-30 22:27:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1718 transitions. [2022-01-30 22:27:55,412 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1718 transitions. Word has length 81 [2022-01-30 22:27:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:27:55,412 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 1718 transitions. [2022-01-30 22:27:55,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 14 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-30 22:27:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1718 transitions. [2022-01-30 22:27:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-30 22:27:55,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:27:55,416 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:27:55,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:27:55,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 22:27:55,641 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:27:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:27:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1077202456, now seen corresponding path program 2 times [2022-01-30 22:27:55,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:27:55,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147923734] [2022-01-30 22:27:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:27:55,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:27:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:27:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:27:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:27:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:27:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:27:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:27:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:27:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:27:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:27:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:27:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:27:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:27:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:27:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-30 22:27:55,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:27:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147923734] [2022-01-30 22:27:55,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147923734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635733412] [2022-01-30 22:27:55,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:27:55,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:27:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:27:55,856 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:27:55,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:27:55,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:27:55,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:27:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-30 22:27:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:27:56,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:27:56,155 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:27:56,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:27:56,286 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:27:56,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:56,363 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:27:56,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:56,434 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:27:56,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:56,506 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-30 22:27:56,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-30 22:27:56,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:27:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-30 22:27:56,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:27:59,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635733412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:27:59,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:27:59,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2022-01-30 22:27:59,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832747590] [2022-01-30 22:27:59,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:27:59,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:27:59,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:27:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:27:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=769, Unknown=1, NotChecked=0, Total=870 [2022-01-30 22:27:59,027 INFO L87 Difference]: Start difference. First operand 1115 states and 1718 transitions. Second operand has 25 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 15 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2022-01-30 22:28:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:00,181 INFO L93 Difference]: Finished difference Result 1261 states and 1900 transitions. [2022-01-30 22:28:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:28:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 15 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) Word has length 89 [2022-01-30 22:28:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:00,186 INFO L225 Difference]: With dead ends: 1261 [2022-01-30 22:28:00,186 INFO L226 Difference]: Without dead ends: 1259 [2022-01-30 22:28:00,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 121 SyntacticMatches, 16 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=271, Invalid=1984, Unknown=1, NotChecked=0, Total=2256 [2022-01-30 22:28:00,187 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 161 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:00,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 540 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1183 Invalid, 0 Unknown, 162 Unchecked, 0.6s Time] [2022-01-30 22:28:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-01-30 22:28:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 305. [2022-01-30 22:28:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 213 states have (on average 1.3333333333333333) internal successors, (284), 220 states have internal predecessors, (284), 74 states have call successors, (74), 18 states have call predecessors, (74), 17 states have return successors, (73), 66 states have call predecessors, (73), 73 states have call successors, (73) [2022-01-30 22:28:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 431 transitions. [2022-01-30 22:28:00,290 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 431 transitions. Word has length 89 [2022-01-30 22:28:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 431 transitions. [2022-01-30 22:28:00,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 15 states have call successors, (27), 5 states have call predecessors, (27), 2 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2022-01-30 22:28:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 431 transitions. [2022-01-30 22:28:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-30 22:28:00,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:00,292 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:00,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:00,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 22:28:00,516 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash 394638609, now seen corresponding path program 1 times [2022-01-30 22:28:00,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:00,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904926196] [2022-01-30 22:28:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:00,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:28:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:28:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:28:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:28:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:28:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:28:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-30 22:28:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:28:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-01-30 22:28:00,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904926196] [2022-01-30 22:28:00,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904926196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460469470] [2022-01-30 22:28:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:00,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:00,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:28:00,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:28:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:00,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-30 22:28:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:01,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:01,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:01,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:01,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:28:01,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-30 22:28:01,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-30 22:28:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-01-30 22:28:01,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:03,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460469470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:03,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:03,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-30 22:28:03,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006033443] [2022-01-30 22:28:03,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:03,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-30 22:28:03,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-30 22:28:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=614, Unknown=1, NotChecked=0, Total=702 [2022-01-30 22:28:03,441 INFO L87 Difference]: Start difference. First operand 305 states and 431 transitions. Second operand has 24 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 14 states have call successors, (31), 5 states have call predecessors, (31), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-01-30 22:28:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:04,584 INFO L93 Difference]: Finished difference Result 342 states and 472 transitions. [2022-01-30 22:28:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-30 22:28:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 14 states have call successors, (31), 5 states have call predecessors, (31), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 99 [2022-01-30 22:28:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:04,586 INFO L225 Difference]: With dead ends: 342 [2022-01-30 22:28:04,586 INFO L226 Difference]: Without dead ends: 340 [2022-01-30 22:28:04,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 25 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=227, Invalid=1578, Unknown=1, NotChecked=0, Total=1806 [2022-01-30 22:28:04,587 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 114 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:04,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 824 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1576 Invalid, 0 Unknown, 110 Unchecked, 0.7s Time] [2022-01-30 22:28:04,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-30 22:28:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 129. [2022-01-30 22:28:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 90 states have (on average 1.211111111111111) internal successors, (109), 93 states have internal predecessors, (109), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-30 22:28:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 160 transitions. [2022-01-30 22:28:04,654 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 160 transitions. Word has length 99 [2022-01-30 22:28:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:04,654 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 160 transitions. [2022-01-30 22:28:04,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 14 states have call successors, (31), 5 states have call predecessors, (31), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-01-30 22:28:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 160 transitions. [2022-01-30 22:28:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-30 22:28:04,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:04,656 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:04,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:04,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-30 22:28:04,881 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1638509862, now seen corresponding path program 5 times [2022-01-30 22:28:04,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:04,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893406615] [2022-01-30 22:28:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:04,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:28:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:28:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:28:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:28:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:28:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:28:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:28:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:28:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:28:05,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893406615] [2022-01-30 22:28:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893406615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036176126] [2022-01-30 22:28:05,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:28:05,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:05,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:05,103 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:28:05,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-30 22:28:05,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-30 22:28:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 22:28:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:05,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:05,479 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:05,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:05,519 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:05,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:05,559 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:05,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:28:05,751 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:28:05,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-01-30 22:28:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:28:05,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:05,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:28:05,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:28:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:28:06,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036176126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:06,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:06,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 21 [2022-01-30 22:28:06,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685899956] [2022-01-30 22:28:06,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:06,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-30 22:28:06,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-30 22:28:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-30 22:28:06,004 INFO L87 Difference]: Start difference. First operand 129 states and 160 transitions. Second operand has 21 states, 20 states have (on average 3.95) internal successors, (79), 18 states have internal predecessors, (79), 13 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-30 22:28:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:11,198 INFO L93 Difference]: Finished difference Result 1270 states and 1961 transitions. [2022-01-30 22:28:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-30 22:28:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.95) internal successors, (79), 18 states have internal predecessors, (79), 13 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) Word has length 105 [2022-01-30 22:28:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:11,203 INFO L225 Difference]: With dead ends: 1270 [2022-01-30 22:28:11,203 INFO L226 Difference]: Without dead ends: 1268 [2022-01-30 22:28:11,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 226 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=752, Invalid=6220, Unknown=0, NotChecked=0, Total=6972 [2022-01-30 22:28:11,205 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 241 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 5726 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 6516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 5726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:11,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 1606 Invalid, 6516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 5726 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-30 22:28:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-01-30 22:28:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 293. [2022-01-30 22:28:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 209 states have (on average 1.291866028708134) internal successors, (270), 214 states have internal predecessors, (270), 69 states have call successors, (69), 15 states have call predecessors, (69), 14 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-30 22:28:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 407 transitions. [2022-01-30 22:28:11,462 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 407 transitions. Word has length 105 [2022-01-30 22:28:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:11,462 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 407 transitions. [2022-01-30 22:28:11,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.95) internal successors, (79), 18 states have internal predecessors, (79), 13 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-30 22:28:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 407 transitions. [2022-01-30 22:28:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-30 22:28:11,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:11,464 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:11,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-30 22:28:11,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:11,679 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2095757656, now seen corresponding path program 1 times [2022-01-30 22:28:11,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:11,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423532490] [2022-01-30 22:28:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:11,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:28:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:28:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:28:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:28:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:28:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:28:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:28:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:28:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:28:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:28:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:28:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:28:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:28:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:28:11,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:11,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423532490] [2022-01-30 22:28:11,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423532490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:28:11,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634376910] [2022-01-30 22:28:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:11,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:11,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:11,925 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:28:11,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-30 22:28:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-30 22:28:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:12,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:28:12,341 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:12,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:12,424 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:28:12,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:28:12,490 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:28:12,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:28:12,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:28:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-01-30 22:28:13,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:14,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:28:14,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:28:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-01-30 22:28:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634376910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:14,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:28:14,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2022-01-30 22:28:14,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172765601] [2022-01-30 22:28:14,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:14,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-30 22:28:14,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-30 22:28:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2022-01-30 22:28:14,495 INFO L87 Difference]: Start difference. First operand 293 states and 407 transitions. Second operand has 38 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 35 states have internal predecessors, (136), 26 states have call successors, (45), 5 states have call predecessors, (45), 2 states have return successors, (40), 24 states have call predecessors, (40), 24 states have call successors, (40) [2022-01-30 22:29:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:01,672 INFO L93 Difference]: Finished difference Result 1340 states and 2039 transitions. [2022-01-30 22:29:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-30 22:29:01,673 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 35 states have internal predecessors, (136), 26 states have call successors, (45), 5 states have call predecessors, (45), 2 states have return successors, (40), 24 states have call predecessors, (40), 24 states have call successors, (40) Word has length 105 [2022-01-30 22:29:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:01,678 INFO L225 Difference]: With dead ends: 1340 [2022-01-30 22:29:01,678 INFO L226 Difference]: Without dead ends: 1338 [2022-01-30 22:29:01,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 202 SyntacticMatches, 18 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4612 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=1869, Invalid=11447, Unknown=24, NotChecked=0, Total=13340 [2022-01-30 22:29:01,682 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 655 mSDsluCounter, 1836 mSDsCounter, 0 mSdLazyCounter, 6094 mSolverCounterSat, 1770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 8414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1770 IncrementalHoareTripleChecker+Valid, 6094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:01,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 2110 Invalid, 8414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1770 Valid, 6094 Invalid, 0 Unknown, 550 Unchecked, 3.3s Time] [2022-01-30 22:29:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-01-30 22:29:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 372. [2022-01-30 22:29:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 266 states have (on average 1.2969924812030076) internal successors, (345), 272 states have internal predecessors, (345), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-30 22:29:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 516 transitions. [2022-01-30 22:29:02,016 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 516 transitions. Word has length 105 [2022-01-30 22:29:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:02,016 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 516 transitions. [2022-01-30 22:29:02,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 35 states have internal predecessors, (136), 26 states have call successors, (45), 5 states have call predecessors, (45), 2 states have return successors, (40), 24 states have call predecessors, (40), 24 states have call successors, (40) [2022-01-30 22:29:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 516 transitions. [2022-01-30 22:29:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-30 22:29:02,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:02,018 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:02,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:02,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-30 22:29:02,227 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1488366969, now seen corresponding path program 6 times [2022-01-30 22:29:02,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:02,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364527199] [2022-01-30 22:29:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:02,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:29:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:29:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:29:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:29:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:29:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:29:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:29:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:29:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-30 22:29:02,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364527199] [2022-01-30 22:29:02,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364527199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490904468] [2022-01-30 22:29:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:29:02,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:02,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:02,448 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:29:02,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-30 22:29:02,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-30 22:29:02,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 22:29:02,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:02,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:02,794 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:02,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:29:02,835 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:02,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:29:03,085 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:29:03,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-01-30 22:29:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-30 22:29:03,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:03,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:29:03,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:29:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-30 22:29:03,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490904468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:03,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:29:03,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 23 [2022-01-30 22:29:03,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730165989] [2022-01-30 22:29:03,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:03,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-30 22:29:03,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-30 22:29:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-30 22:29:03,380 INFO L87 Difference]: Start difference. First operand 372 states and 516 transitions. Second operand has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 20 states have internal predecessors, (83), 15 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2022-01-30 22:29:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:17,472 INFO L93 Difference]: Finished difference Result 4349 states and 6853 transitions. [2022-01-30 22:29:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-01-30 22:29:17,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 20 states have internal predecessors, (83), 15 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) Word has length 113 [2022-01-30 22:29:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:17,485 INFO L225 Difference]: With dead ends: 4349 [2022-01-30 22:29:17,486 INFO L226 Difference]: Without dead ends: 4347 [2022-01-30 22:29:17,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 243 SyntacticMatches, 9 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13024 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2692, Invalid=29528, Unknown=0, NotChecked=0, Total=32220 [2022-01-30 22:29:17,495 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 341 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 11239 mSolverCounterSat, 1769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 13008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1769 IncrementalHoareTripleChecker+Valid, 11239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:17,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 2859 Invalid, 13008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1769 Valid, 11239 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-01-30 22:29:17,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2022-01-30 22:29:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 792. [2022-01-30 22:29:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 569 states have (on average 1.328646748681898) internal successors, (756), 581 states have internal predecessors, (756), 200 states have call successors, (200), 23 states have call predecessors, (200), 22 states have return successors, (199), 187 states have call predecessors, (199), 199 states have call successors, (199) [2022-01-30 22:29:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1155 transitions. [2022-01-30 22:29:18,431 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1155 transitions. Word has length 113 [2022-01-30 22:29:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:18,431 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1155 transitions. [2022-01-30 22:29:18,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 20 states have internal predecessors, (83), 15 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2022-01-30 22:29:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1155 transitions. [2022-01-30 22:29:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-30 22:29:18,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:18,433 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:18,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:18,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-30 22:29:18,648 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 473207689, now seen corresponding path program 1 times [2022-01-30 22:29:18,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407177892] [2022-01-30 22:29:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:18,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:29:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:29:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:29:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:29:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:29:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:29:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:29:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:29:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:29:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:29:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:29:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:29:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:29:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:29:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:29:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-30 22:29:18,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407177892] [2022-01-30 22:29:18,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407177892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:29:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231204162] [2022-01-30 22:29:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:18,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:18,908 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:29:18,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-30 22:29:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-30 22:29:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:19,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:29:19,315 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:29:19,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-30 22:29:19,395 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:29:19,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:29:19,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:29:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-30 22:29:19,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:20,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:29:20,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:29:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-30 22:29:20,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231204162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:20,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:29:20,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 41 [2022-01-30 22:29:20,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419242361] [2022-01-30 22:29:20,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:20,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-30 22:29:20,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-30 22:29:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2022-01-30 22:29:20,952 INFO L87 Difference]: Start difference. First operand 792 states and 1155 transitions. Second operand has 41 states, 39 states have (on average 3.717948717948718) internal successors, (145), 38 states have internal predecessors, (145), 29 states have call successors, (48), 5 states have call predecessors, (48), 2 states have return successors, (43), 27 states have call predecessors, (43), 27 states have call successors, (43) [2022-01-30 22:31:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:31:06,361 INFO L93 Difference]: Finished difference Result 3330 states and 5131 transitions. [2022-01-30 22:31:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-30 22:31:06,362 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.717948717948718) internal successors, (145), 38 states have internal predecessors, (145), 29 states have call successors, (48), 5 states have call predecessors, (48), 2 states have return successors, (43), 27 states have call predecessors, (43), 27 states have call successors, (43) Word has length 113 [2022-01-30 22:31:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:31:06,370 INFO L225 Difference]: With dead ends: 3330 [2022-01-30 22:31:06,370 INFO L226 Difference]: Without dead ends: 3328 [2022-01-30 22:31:06,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 219 SyntacticMatches, 17 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11970 ImplicationChecksByTransitivity, 97.2s TimeCoverageRelationStatistics Valid=4170, Invalid=26573, Unknown=57, NotChecked=0, Total=30800 [2022-01-30 22:31:06,374 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 1015 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 9348 mSolverCounterSat, 2721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 12773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2721 IncrementalHoareTripleChecker+Valid, 9348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:31:06,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1033 Valid, 2586 Invalid, 12773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2721 Valid, 9348 Invalid, 0 Unknown, 704 Unchecked, 5.1s Time] [2022-01-30 22:31:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2022-01-30 22:31:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 921. [2022-01-30 22:31:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 661 states have (on average 1.3434190620272315) internal successors, (888), 672 states have internal predecessors, (888), 229 states have call successors, (229), 31 states have call predecessors, (229), 30 states have return successors, (228), 217 states have call predecessors, (228), 228 states have call successors, (228) [2022-01-30 22:31:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1345 transitions. [2022-01-30 22:31:07,352 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1345 transitions. Word has length 113 [2022-01-30 22:31:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:31:07,352 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1345 transitions. [2022-01-30 22:31:07,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.717948717948718) internal successors, (145), 38 states have internal predecessors, (145), 29 states have call successors, (48), 5 states have call predecessors, (48), 2 states have return successors, (43), 27 states have call predecessors, (43), 27 states have call successors, (43) [2022-01-30 22:31:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1345 transitions. [2022-01-30 22:31:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-30 22:31:07,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:31:07,355 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:31:07,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-30 22:31:07,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:07,572 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:31:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:31:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 660735720, now seen corresponding path program 7 times [2022-01-30 22:31:07,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:31:07,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267444563] [2022-01-30 22:31:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:31:07,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:31:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:31:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:31:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:31:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:31:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:31:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:31:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:31:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:31:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:31:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:31:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:31:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:31:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:31:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:31:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:31:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:31:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-30 22:31:07,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:31:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267444563] [2022-01-30 22:31:07,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267444563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:31:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773706701] [2022-01-30 22:31:07,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:31:07,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:31:07,811 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:31:07,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-30 22:31:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 22:31:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:31:08,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:31:08,053 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:31:08,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:31:08,305 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:31:08,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-01-30 22:31:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-30 22:31:08,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:31:08,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:31:08,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:31:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-30 22:31:08,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773706701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:31:08,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:31:08,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2022-01-30 22:31:08,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422797419] [2022-01-30 22:31:08,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:31:08,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 22:31:08,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:31:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 22:31:08,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-30 22:31:08,591 INFO L87 Difference]: Start difference. First operand 921 states and 1345 transitions. Second operand has 25 states, 24 states have (on average 3.625) internal successors, (87), 22 states have internal predecessors, (87), 17 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2022-01-30 22:31:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:31:37,329 INFO L93 Difference]: Finished difference Result 10200 states and 16208 transitions. [2022-01-30 22:31:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-01-30 22:31:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.625) internal successors, (87), 22 states have internal predecessors, (87), 17 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) Word has length 121 [2022-01-30 22:31:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:31:37,358 INFO L225 Difference]: With dead ends: 10200 [2022-01-30 22:31:37,358 INFO L226 Difference]: Without dead ends: 10198 [2022-01-30 22:31:37,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 260 SyntacticMatches, 8 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27507 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4313, Invalid=60967, Unknown=0, NotChecked=0, Total=65280 [2022-01-30 22:31:37,369 INFO L933 BasicCegarLoop]: 1057 mSDtfsCounter, 388 mSDsluCounter, 4178 mSDsCounter, 0 mSdLazyCounter, 21164 mSolverCounterSat, 2751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 5235 SdHoareTripleChecker+Invalid, 23915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2751 IncrementalHoareTripleChecker+Valid, 21164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:31:37,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 5235 Invalid, 23915 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2751 Valid, 21164 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-01-30 22:31:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2022-01-30 22:31:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 2034. [2022-01-30 22:31:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1463 states have (on average 1.3629528366370471) internal successors, (1994), 1487 states have internal predecessors, (1994), 535 states have call successors, (535), 36 states have call predecessors, (535), 35 states have return successors, (534), 510 states have call predecessors, (534), 534 states have call successors, (534) [2022-01-30 22:31:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 3063 transitions. [2022-01-30 22:31:39,755 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 3063 transitions. Word has length 121 [2022-01-30 22:31:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:31:39,755 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 3063 transitions. [2022-01-30 22:31:39,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.625) internal successors, (87), 22 states have internal predecessors, (87), 17 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2022-01-30 22:31:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 3063 transitions. [2022-01-30 22:31:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-30 22:31:39,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:31:39,758 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:31:39,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-30 22:31:39,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:39,958 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:31:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:31:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 243339114, now seen corresponding path program 1 times [2022-01-30 22:31:39,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:31:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929830730] [2022-01-30 22:31:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:31:39,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:31:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:31:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:31:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:31:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:31:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:31:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:31:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:31:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:31:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:31:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:31:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:31:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:31:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:31:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:31:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:31:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:31:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-30 22:31:40,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:31:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929830730] [2022-01-30 22:31:40,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929830730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:31:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895838519] [2022-01-30 22:31:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:31:40,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:40,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:31:40,220 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:31:40,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-30 22:31:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-30 22:31:40,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:31:40,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:31:40,711 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:31:40,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:31:41,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:31:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-30 22:31:41,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:31:43,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:31:43,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:31:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-30 22:31:43,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895838519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:31:43,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:31:43,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 44 [2022-01-30 22:31:43,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374103648] [2022-01-30 22:31:43,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:31:43,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-30 22:31:43,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:31:43,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-30 22:31:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1726, Unknown=1, NotChecked=0, Total=1892 [2022-01-30 22:31:43,862 INFO L87 Difference]: Start difference. First operand 2034 states and 3063 transitions. Second operand has 44 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 41 states have internal predecessors, (154), 32 states have call successors, (51), 5 states have call predecessors, (51), 2 states have return successors, (46), 30 states have call predecessors, (46), 30 states have call successors, (46) [2022-01-30 22:31:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:31:50,745 INFO L93 Difference]: Finished difference Result 3627 states and 5474 transitions. [2022-01-30 22:31:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-30 22:31:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 41 states have internal predecessors, (154), 32 states have call successors, (51), 5 states have call predecessors, (51), 2 states have return successors, (46), 30 states have call predecessors, (46), 30 states have call successors, (46) Word has length 121 [2022-01-30 22:31:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:31:50,754 INFO L225 Difference]: With dead ends: 3627 [2022-01-30 22:31:50,754 INFO L226 Difference]: Without dead ends: 3625 [2022-01-30 22:31:50,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 248 SyntacticMatches, 16 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=737, Invalid=7272, Unknown=1, NotChecked=0, Total=8010 [2022-01-30 22:31:50,757 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 511 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 3655 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 4805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 3655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-30 22:31:50,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 1371 Invalid, 4805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 3655 Invalid, 0 Unknown, 340 Unchecked, 1.8s Time] [2022-01-30 22:31:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2022-01-30 22:31:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 1991. [2022-01-30 22:31:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1435 states have (on average 1.3533101045296168) internal successors, (1942), 1458 states have internal predecessors, (1942), 508 states have call successors, (508), 48 states have call predecessors, (508), 47 states have return successors, (507), 484 states have call predecessors, (507), 507 states have call successors, (507) [2022-01-30 22:31:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 2957 transitions. [2022-01-30 22:31:53,076 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 2957 transitions. Word has length 121 [2022-01-30 22:31:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:31:53,076 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 2957 transitions. [2022-01-30 22:31:53,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 41 states have internal predecessors, (154), 32 states have call successors, (51), 5 states have call predecessors, (51), 2 states have return successors, (46), 30 states have call predecessors, (46), 30 states have call successors, (46) [2022-01-30 22:31:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 2957 transitions. [2022-01-30 22:31:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-30 22:31:53,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:31:53,080 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:31:53,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-30 22:31:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:53,295 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:31:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:31:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1534380617, now seen corresponding path program 8 times [2022-01-30 22:31:53,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:31:53,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870371425] [2022-01-30 22:31:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:31:53,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:31:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:31:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:31:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:31:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:31:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:31:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:31:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:31:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:31:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:31:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:31:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:31:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:31:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:31:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:31:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:31:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:31:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:31:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:31:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:31:53,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:31:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870371425] [2022-01-30 22:31:53,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870371425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:31:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587281086] [2022-01-30 22:31:53,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:31:53,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:31:53,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:31:53,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-30 22:31:53,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:31:53,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:31:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-30 22:31:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:31:53,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:31:54,062 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:31:54,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-01-30 22:31:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:31:54,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:31:54,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:31:54,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:31:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:31:54,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587281086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:31:54,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:31:54,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 27 [2022-01-30 22:31:54,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463379275] [2022-01-30 22:31:54,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:31:54,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-30 22:31:54,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:31:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-30 22:31:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:31:54,362 INFO L87 Difference]: Start difference. First operand 1991 states and 2957 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 18 states have call successors, (28), 4 states have call predecessors, (28), 1 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-30 22:32:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:32:50,755 INFO L93 Difference]: Finished difference Result 22714 states and 36178 transitions. [2022-01-30 22:32:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2022-01-30 22:32:50,757 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 18 states have call successors, (28), 4 states have call predecessors, (28), 1 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) Word has length 129 [2022-01-30 22:32:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:32:50,817 INFO L225 Difference]: With dead ends: 22714 [2022-01-30 22:32:50,817 INFO L226 Difference]: Without dead ends: 22712 [2022-01-30 22:32:50,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 277 SyntacticMatches, 7 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72142 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8219, Invalid=156211, Unknown=0, NotChecked=0, Total=164430 [2022-01-30 22:32:50,840 INFO L933 BasicCegarLoop]: 1698 mSDtfsCounter, 403 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 37743 mSolverCounterSat, 3848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 9074 SdHoareTripleChecker+Invalid, 41591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3848 IncrementalHoareTripleChecker+Valid, 37743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:32:50,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 9074 Invalid, 41591 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3848 Valid, 37743 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2022-01-30 22:32:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2022-01-30 22:32:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 5082. [2022-01-30 22:32:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5082 states, 3661 states have (on average 1.3744878448511335) internal successors, (5032), 3717 states have internal predecessors, (5032), 1364 states have call successors, (1364), 57 states have call predecessors, (1364), 56 states have return successors, (1363), 1307 states have call predecessors, (1363), 1363 states have call successors, (1363) [2022-01-30 22:32:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 7759 transitions. [2022-01-30 22:32:57,216 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 7759 transitions. Word has length 129 [2022-01-30 22:32:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:32:57,216 INFO L470 AbstractCegarLoop]: Abstraction has 5082 states and 7759 transitions. [2022-01-30 22:32:57,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 18 states have call successors, (28), 4 states have call predecessors, (28), 1 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-30 22:32:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 7759 transitions. [2022-01-30 22:32:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-30 22:32:57,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:32:57,223 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:32:57,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-30 22:32:57,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-30 22:32:57,424 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:32:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:32:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash -151799221, now seen corresponding path program 1 times [2022-01-30 22:32:57,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:32:57,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314289360] [2022-01-30 22:32:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:32:57,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:32:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:32:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:32:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:32:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:32:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:32:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:32:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:32:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:32:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:32:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:32:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:32:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:32:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:32:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:32:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:32:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:32:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:32:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:32:57,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:32:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314289360] [2022-01-30 22:32:57,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314289360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:32:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16802179] [2022-01-30 22:32:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:32:57,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:32:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:32:57,683 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:32:57,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-30 22:32:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:32:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-30 22:32:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:32:58,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:32:58,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-30 22:32:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:32:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:33:01,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-30 22:33:01,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-30 22:33:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-30 22:33:01,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16802179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:33:01,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:33:01,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 47 [2022-01-30 22:33:01,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647408776] [2022-01-30 22:33:01,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:33:01,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-30 22:33:01,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:33:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-30 22:33:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1993, Unknown=1, NotChecked=0, Total=2162 [2022-01-30 22:33:01,406 INFO L87 Difference]: Start difference. First operand 5082 states and 7759 transitions. Second operand has 47 states, 45 states have (on average 3.577777777777778) internal successors, (161), 44 states have internal predecessors, (161), 33 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 31 states have call predecessors, (49), 31 states have call successors, (49) [2022-01-30 22:37:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:37:49,771 INFO L93 Difference]: Finished difference Result 29954 states and 47447 transitions. [2022-01-30 22:37:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 777 states. [2022-01-30 22:37:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.577777777777778) internal successors, (161), 44 states have internal predecessors, (161), 33 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 31 states have call predecessors, (49), 31 states have call successors, (49) Word has length 129 [2022-01-30 22:37:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:37:49,848 INFO L225 Difference]: With dead ends: 29954 [2022-01-30 22:37:49,848 INFO L226 Difference]: Without dead ends: 29952 [2022-01-30 22:37:49,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1511 GetRequests, 687 SyntacticMatches, 14 SemanticMatches, 810 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310153 ImplicationChecksByTransitivity, 229.0s TimeCoverageRelationStatistics Valid=43685, Invalid=614700, Unknown=147, NotChecked=0, Total=658532 [2022-01-30 22:37:49,922 INFO L933 BasicCegarLoop]: 1310 mSDtfsCounter, 3529 mSDsluCounter, 4575 mSDsCounter, 0 mSdLazyCounter, 34886 mSolverCounterSat, 14727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3530 SdHoareTripleChecker+Valid, 5885 SdHoareTripleChecker+Invalid, 52058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14727 IncrementalHoareTripleChecker+Valid, 34886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2445 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:37:49,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3530 Valid, 5885 Invalid, 52058 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14727 Valid, 34886 Invalid, 0 Unknown, 2445 Unchecked, 20.1s Time] [2022-01-30 22:37:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29952 states. [2022-01-30 22:37:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29952 to 5428. [2022-01-30 22:37:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 3906 states have (on average 1.3870967741935485) internal successors, (5418), 3953 states have internal predecessors, (5418), 1452 states have call successors, (1452), 71 states have call predecessors, (1452), 69 states have return successors, (1451), 1403 states have call predecessors, (1451), 1451 states have call successors, (1451) [2022-01-30 22:37:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 8321 transitions. [2022-01-30 22:37:57,202 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 8321 transitions. Word has length 129 [2022-01-30 22:37:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:37:57,202 INFO L470 AbstractCegarLoop]: Abstraction has 5428 states and 8321 transitions. [2022-01-30 22:37:57,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.577777777777778) internal successors, (161), 44 states have internal predecessors, (161), 33 states have call successors, (54), 5 states have call predecessors, (54), 2 states have return successors, (49), 31 states have call predecessors, (49), 31 states have call successors, (49) [2022-01-30 22:37:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 8321 transitions. [2022-01-30 22:37:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-30 22:37:57,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:37:57,211 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:37:57,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-30 22:37:57,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-30 22:37:57,423 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:37:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:37:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1409114966, now seen corresponding path program 9 times [2022-01-30 22:37:57,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:37:57,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21774258] [2022-01-30 22:37:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:37:57,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:37:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:37:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:37:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:37:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:37:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:37:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:37:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:37:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:37:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:37:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:37:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-30 22:37:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 22:37:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:37:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-30 22:37:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-30 22:37:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 22:37:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 22:37:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 22:37:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:37:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 115 proven. 45 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-01-30 22:37:57,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:37:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21774258] [2022-01-30 22:37:57,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21774258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:37:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041973171] [2022-01-30 22:37:57,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:37:57,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:37:57,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:37:57,857 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:37:57,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-30 22:37:58,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-30 22:37:58,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:37:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 22:37:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:37:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 144 proven. 16 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-01-30 22:37:59,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:37:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 144 proven. 16 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-01-30 22:37:59,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041973171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:37:59,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:37:59,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 47 [2022-01-30 22:37:59,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374601623] [2022-01-30 22:37:59,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:37:59,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-30 22:37:59,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:37:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-30 22:37:59,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1648, Unknown=0, NotChecked=0, Total=2162 [2022-01-30 22:37:59,713 INFO L87 Difference]: Start difference. First operand 5428 states and 8321 transitions. Second operand has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 35 states have call successors, (55), 5 states have call predecessors, (55), 3 states have return successors, (52), 34 states have call predecessors, (52), 34 states have call successors, (52) [2022-01-30 22:38:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:38:07,020 INFO L93 Difference]: Finished difference Result 5774 states and 8672 transitions. [2022-01-30 22:38:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:38:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 35 states have call successors, (55), 5 states have call predecessors, (55), 3 states have return successors, (52), 34 states have call predecessors, (52), 34 states have call successors, (52) Word has length 137 [2022-01-30 22:38:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:38:07,030 INFO L225 Difference]: With dead ends: 5774 [2022-01-30 22:38:07,030 INFO L226 Difference]: Without dead ends: 5338 [2022-01-30 22:38:07,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=715, Invalid=2477, Unknown=0, NotChecked=0, Total=3192 [2022-01-30 22:38:07,033 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 391 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:38:07,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 174 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-30 22:38:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2022-01-30 22:38:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 5274. [2022-01-30 22:38:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5274 states, 3792 states have (on average 1.3834388185654007) internal successors, (5246), 3833 states have internal predecessors, (5246), 1414 states have call successors, (1414), 69 states have call predecessors, (1414), 67 states have return successors, (1413), 1371 states have call predecessors, (1413), 1413 states have call successors, (1413) [2022-01-30 22:38:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5274 states to 5274 states and 8073 transitions. [2022-01-30 22:38:13,488 INFO L78 Accepts]: Start accepts. Automaton has 5274 states and 8073 transitions. Word has length 137 [2022-01-30 22:38:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:38:13,488 INFO L470 AbstractCegarLoop]: Abstraction has 5274 states and 8073 transitions. [2022-01-30 22:38:13,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 35 states have call successors, (55), 5 states have call predecessors, (55), 3 states have return successors, (52), 34 states have call predecessors, (52), 34 states have call successors, (52) [2022-01-30 22:38:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5274 states and 8073 transitions. [2022-01-30 22:38:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-30 22:38:13,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:38:13,499 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:38:13,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-30 22:38:13,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:38:13,723 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:38:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:38:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1388190187, now seen corresponding path program 10 times [2022-01-30 22:38:13,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:38:13,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078030466] [2022-01-30 22:38:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:38:13,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:38:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:38:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-30 22:38:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:38:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-30 22:38:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:38:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:38:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-30 22:38:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-30 22:38:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 22:38:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 22:38:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-30 22:38:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-30 22:38:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-30 22:38:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-30 22:38:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-30 22:38:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:13,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-30 22:38:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:14,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-30 22:38:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:14,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-30 22:38:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-30 22:38:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:14,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-30 22:38:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-30 22:38:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:14,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-30 22:38:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:38:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 16 proven. 173 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-01-30 22:38:14,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:38:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078030466] [2022-01-30 22:38:14,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078030466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:38:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118606012] [2022-01-30 22:38:14,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:38:14,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:38:14,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:38:14,017 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:38:14,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-30 22:38:14,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:38:14,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:38:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-30 22:38:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:38:14,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-30 22:38:14,359 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:38:14,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:38:14,401 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:38:14,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:38:14,434 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-30 22:38:14,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-30 22:38:14,768 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-30 22:38:14,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-01-30 22:38:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 16 proven. 173 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-01-30 22:38:14,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:38:15,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-30 22:38:15,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-30 22:38:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 16 proven. 173 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-01-30 22:38:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118606012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:38:15,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:38:15,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 30 [2022-01-30 22:38:15,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634843219] [2022-01-30 22:38:15,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:38:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-30 22:38:15,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:38:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-30 22:38:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:38:15,157 INFO L87 Difference]: Start difference. First operand 5274 states and 8073 transitions. Second operand has 30 states, 29 states have (on average 3.896551724137931) internal successors, (113), 27 states have internal predecessors, (113), 22 states have call successors, (37), 4 states have call predecessors, (37), 1 states have return successors, (33), 21 states have call predecessors, (33), 21 states have call successors, (33)